Virtual disk does not work in windows 7

[m^2]

Pawel - do you have any idea how much the signing process costs??
(is there a cheaper way than $900/2yr on verisign)

I have no idea. Also, I dont know how to solve driver issue... I dont really know why Microsoft did this for Win7 x64... I am also using this system.
I hope, maybe someone of you - users - will find the way, how to turn off driver signing in safe way...
-Pawel

Officially, there are 2 reasons:
To improve reliability - no amateur drivers crashing kernel. But it doesn't make sense, what amateurs are capable of writing drivers?
To improve security - if you signed a virus, you can be found. Sounds better, but somehow I'm not surprised that it didn't help at all...
I guess that DRM was one of main reasons. If you can get to the kernel, you can defeat it, likely easily if you're a pro. And gray area software makers don't use stolen certificates, yet they are usually small, so it's a more significant obstacle. But repeat - it's a pure guess.